Pith Number

pith:NI6FVQGF

pith:2016:NI6FVQGF76JIFCXBFGJ5V5SRQN

not attested not anchored not stored refs pending

Towards Precision Supermassive Black Hole Masses using Megamaser Disks

Anca Constantin, Cheng-Yu Kuo, James A. Braatz, Jenny E. Greene, Remco C. E. van den Bosch

arxiv:1601.00645 v2 · 2016-01-04 · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NI6FVQGF76JIFCXBFGJ5V5SRQN}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:12:55.056893Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a3c5ac0c5ff92828ae12993daf65183484dba91cc498ec3e466186ed811df16

Aliases

arxiv: 1601.00645 · arxiv_version: 1601.00645v2 · doi: 10.48550/arxiv.1601.00645 · pith_short_12: NI6FVQGF76JI · pith_short_16: NI6FVQGF76JIFCXB · pith_short_8: NI6FVQGF

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/NI6FVQGF76JIFCXBFGJ5V5SRQN \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 6a3c5ac0c5ff92828ae12993daf65183484dba91cc498ec3e466186ed811df16

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "59b6841ff9b2055ffd43fb73db644e2e0112c32d95e2dccab4ca4a5080e782d0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2016-01-04T21:00:00Z",
    "title_canon_sha256": "3c65b73b6756a352b6d4296d7335df3f8cf8d4b7a03c808b6bf71a0efd024433"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.00645",
    "kind": "arxiv",
    "version": 2
  }
}